/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/SelectiveTessellate.h
Vertices should be passed in CW order.
void ComputeInnerConcentricTriangle ( const FVector3d & U, const FVector3d & V, const FVector3d & W, const int EdgeTessellationLevel, FVector3d & InnerU, FVector3d & InnerV, FVector3d & InnerW ) const